Joint for tubular structures.



A. HENDRICKS & W. P. BROCKSCHMIDT.

JOINT FOR TUEULAR STRUCTURES.

APPLICATION FILED NOV.2I 1910.

Patented M1120, 1915.

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Application filed November 21, 1910. Serial No, dhtfitll.

To all whom. it may concern:

Be it known that we, Anonsrm HEN- mucns and WILLIAM P. BROCKSCHM1DT,Oitlzens of the United States of America, residing at Grand Rapids, inthe county of Kent and State of Michigan, have invented certain new anduseful Improvements in .loints for Tubularf Structures; and we do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

Our invention relates to improvements in joints for tubular structures,such as the frame of metallic furniture, metal towers and various otheranalogous structures, and its object is to provide a strong substantialjoint for such structures without necessity for brazing or soldering,and that can be readily assembled or taken apart as occasion requires,and to provide the device with various new and useful featureshereinafter more fully described and particularly pointed out in theclaim.

Our invention consists essentially of tubular upright members spacedapart, a connecting tubular member extending there between, saddlesinterposed between the ends of the connecting member and said uprightmembers havin central openings and concave surfaces adapted to engagesaid members, washers opposite the saddles, between which saddles andwashers the upright members are clamped, and a bolt ertendin through allof these described parts to bin the same firmly together, as will morefully appear by reference to the accompanying drawings in which:

Figure l is a side elevation of a device embodying our invention; Fig.:2 the same shown in vertical section; Fig. 3 a horizontal section ofthe same on the line 33 of fig. 2; big. fr a perspective detail of oneof the sades; and Fig. 5 the same of one of the washers.

liilre nihers refer to like parts in all of the figures.

ll refer to the upright tubular members of a structure such as articlesof furniture, a metal tower, or other similar structure. T he uprighttubes may be adjusted vertical or inclined as preferred. Our inventionrelates to connecting the same to each other by means of a transversemember 2, which may be disposed horizontally or inclined as the work mayrequire. The device herein shown has the upright members 1 vertical, andthe connecting member 2 horizontal. llnterposed between the respectiveends of the horizontal member 2, and adjacent sides of the uprights l,are saddles 3 having concave surfaces adapted to fit the adjacentsurfaces of the upright members and partially surrounding the same andalso provided with in line with the openings of the saddles and washers,and the bolt 7 extends through all of these parts and at its respectiveends is providedwith a nut 8, whereby the bolt can be tightened tofirmly draw all of the said parts together, thus forming a substantialand rigid structure that can be readily taken apart or assembled asoccasion may require. The openings in the uprights are made larger thanthe bolt, whereby the bolt will adjust laterally therein. The saddlesare thus per mitted to adjust longitudinally on the uprights, wherebythe legs of a structure, such as stable, can be readily squared orleveled before the bolts are fully tightened.

In some structures it is desirable to hold the connecting member againstaccidental rotative movement to so adjust the same.

What we claim is In a device such as described, spaced tubular uprightsformed with alining openings, saddles engaging the inner sides of saiduprights, the faces of said saddles conforming to the shape of theuprights, bosses having openings therein registering with the openingsof the tubular uprights, washers disposed upon the uprights on oppositesides thereof to the saddles, said washers having openings formedtherein and alining with the openings in the uprights and saddles, atubular connecting member disposed with its ends engaging the bosses ofthe saddles,

a tie rod having threaded ends passing In testimony whereof we afiix oursigna- -through the openmgs in the bosses; uprights vtures in presenceof two witnesses. and Washers, the diameter of the said tie rod AUGUSTINHENDRICKS. bemg less than the dlameters of the open- 1 1 5 ings in theWashers, uprights and saddles WILLIAM BROLKSLHMIDT and the openings inthe bosses being flared to Witnesses: guide the tie rod through saidalining PALMER A. JONES,

openings. HAROLD O. VAN ANTWERP.

